<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>label与for</title>
</head>
<body>

    
    <script>

        /*

            label 语句通常用在循环嵌套中，相当于声明了这个循环体.
        
        */

        var num = 0;
        state: 
            for (var i=0;i<10;i++) {
                for(var j=0;j<10;j++) {
                    if (i == 5 && j == 5) {
                        continue state;
                    }
                    num ++;
                }
            }

        console.log(num);
    </script>
</body>
</html>